CY7C1041D
4-Mbit (256K x 16) Static RAM
Features
Functional Description[1]
• Pin-and function-compatible with CY7C1041B
• High speed
— tAA = 10 ns
The CY7C1041D is a high-performance CMOS static RAM
organized as 256K words by 16 bits. Writing to the device is
accomplished by taking Chip Enable (CE) and Write Enable
(WE) inputs LOW. If Byte Low Enable (BLE) is LOW, then data
from I/O pins (I/O0 through I/O7), is written into the location
specified on the address pins (A0 through A17). If Byte High
Enable (BHE) is LOW, then data from I/O pins (I/O8 through
I/O15) is written into the location specified on the address pins
(A0 through A17).
• Low active power
— ICC = 90 mA @ 10 ns (Industrial)
• Low CMOS standby power
— ISB2 = 10 mA
Reading from the device is accomplished by taking Chip
Enable (CE) and Output Enable (OE) LOW while forcing the
Write Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW,
then data from the memory location specified by the address
pins will appear on I/O0 to I/O7. If Byte High Enable (BHE) is
LOW, then data from memory will appear on I/O8 to I/O15. See
the truth table at the back of this data sheet for a complete
description of read and write modes.
• 2.0 V Data Retention
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
• Availableinlead-free44-Lead(400-Mil)MoldedSOJand
44-Pin TSOP II packages
The input/output pins (I/O0 through I/O15) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), the BHE and BLE
are disabled (BHE, BLE HIGH), or during a write operation (CE
LOW, and WE LOW).
The CY7C1041D is available in
a
standard 44-pin
400-mil-wide body width SOJ and 44-pin TSOP II package
with center power and ground (revolutionary) pinout.
Pin Configurations
Logic Block Diagram
/ TSOPII
SOJ
Top View
INPUT BUFFER
44
1
A
A
17
0
43
42
41
40
39
38
37
36
35
34
33
A
A
16
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
A
0
1
A
A
15
2
A
A
OE
3
A
2
3
BHE
BLE
A
I/O0–I/O7
4
A
CE
A
256K x 16
4
I/O
I/O
0
15
I/O8–I/O15
A
5
6
I/O
I/O
I/O
1
14
13
12
A
I/O
2
A
7
8
I/O
V
I/O
A
3
V
SS
CC
V
V
SS
CC
32
I/O
I/O
I/O
4
5
6
7
11
10
9
8
COLUMN
31
30
29
28
27
26
25
I/O
I/O
I/O
DECODER
I/O
I/O
WE 17
NC
18
A
A
14
5
19
BHE
A
A
6
13
WE
CE
OE
A
20
21
22
A
12
11
7
A
A
24
23
8
A
A
10
9
BLE
Note:
1. For guidelines on SRAM system design, please refer to the “System Design Guidelines” Cypress application note, available on the internet at www.cypress.com.
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Document #: 38-05472 Rev. *C
Revised March 31, 2006
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